'...a multitude of soap bubbles which explode from time to time...': Pino Pascali's final works 1967-1968, Camden Arts Centre, London, until May 1 2011

Pascali’s first UK museum show features work from just two years of his life: 1967-1968. The Italian artist staged a political protest by closing his show at the XXXIV Venice Biennale. So these are playful sculptures for serious times.Laurie Anderson, Trisha Brown, Gordon Matta-Clark: Pioneers of the Downtown Scene, New York 1970s, Barbican Art Gallery, London, until May 22 2011

Recession, rather than revolution, is in the air at Barbican as the gallery revisits an art scene from the worst of times in NYC. Urban interventions, restauranteering and dance are among the way artists responded. They were poor, but apparently happy.

The lights are going out for analogue photography in this award-winning show. But non-photographers should also be fascinated by these shots of remaining darkrooms from all around the world. They appear as strange and magical dwellings.

Mary Kelly: Projects 1973 – 2010, , Manchester, until June 12 2011

As serious-minded installations demonstrate, Kelly puts the work in artwork. Months' worth of laundry have helped her print several pieces on lint. Her best known project documents the domestic labour required to bring up a child. An impressive show.Hew Locke: Starchitect, ArtSway, Hampshire, until April 3 2011

Fourth plinth shortlistee Locke shifts his architectual plans to the New Forest, with a major walk-in installation at ArtSway. Fantastical items are promised within this temporary grotto, bedecked no doubt with trademark superstitious gimcrackery.

Subterranean space Grey Area becomes both a pop-up shop and a voodoo temple. It's an enticing but also frightening combination where visitors who don't flee are invited to hang out by the altar. Many will recognise this as the handiwork of Chicks on Speed.

Whether due to French insularity or British anglocentricity, this senior international artist has rarely been shown on these shores. His photography, sculpture and painting has an everyday look, which Bustamente imbues with mystery, “but not too much.”